Model-based form error compensation in the turning of thin-walled cylindrical parts

The turning of thin-walled, hollow, cylindrical parts is often not possible when using the common hydraulically operated 3- or 4-jaw chucks. This is due to the deformation of the part by the clamping force of the chuck. Even low clamping forces cause elastic deformations of the clamped workpiece, which results in surface errors due to machining after the unclamping and elastic recovery of the part. For this reason, several approaches have been adopted in the past in order to quantify and minimise the clamping-induced deformations. In this paper a model-based error compensation for thin-walled, cylindrical parts in turning is presented as a universal solution. In this work, a compensation by different models is designed and realised by an intelligent, adaptive and interchangeable turning tool holder with integrated sensors and actuators.